<!doctype html>
<html lang="en">

<head>
    <!-- Required meta tags -->
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">

    <!-- Bootstrap CSS -->
    <link rel="stylesheet" href="https://cdn.bootcss.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm"
        crossorigin="anonymous">

    <title>JavaScript 实例</title>
</head>

<body>
    <div class="container">
        <div class="jumbotron jumbotron-fluid">
            <div class="container">
                <h1 class="display-4">JavaScript 实例</h1>
            </div>
        </div>
        <div class="alert alert-primary" role="alert">
            <a href="./timing/index.html" class="alert-link">计时器</a>
        </div>
        <div class="alert alert-primary" role="alert">
            <a href="./cookies/index.html" class="alert-link">Cookie</a>
        </div>
        <div class="alert alert-primary" role="alert">
            <a href="./history/index.html" class="alert-link">History</a>
        </div>
        <div class="alert alert-primary" role="alert">
            <a href="./window/index.html" class="alert-link">Window</a>
        </div>
        <div class="alert alert-primary" role="alert">
            <a href="./screen/index.html" class="alert-link">screen</a>
        </div>
    </div>

    <!-- Optional JavaScript -->
    <!-- jQuery first, then Popper.js, then Bootstrap JS -->
    <script src="https://cdn.bootcss.com/jquery/3.2.1/jquery.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN"
        crossorigin="anonymous"></script>
    <script src="https://cdn.bootcss.com/popper.js/1.12.9/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q"
        crossorigin="anonymous"></script>
    <script src="https://cdn.bootcss.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl"
        crossorigin="anonymous"></script>
</body>

</html>